There is a practice I have seen in many synagogues
during the High Holidays for children to come up to the bimah
for the blowing of the shofar. Where does this come from?

Dear Jeffrey Gold,

It is an expansion of the custom to bring the children
to the synagogue in order to educate them in the practicing of
mitzvos. They come closer so they can more easily see and hear
the shofar. However, if this practice causes a disturbance it
should be abolished.